validation on textbox

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I am developing an application on ASP.NET in C# where I need to pass only text and numbers. Please help me to do this.
Thanks in advance.

Posted 13-Nov-12 19:17pm

Imteyaz Ahmed

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Rajesh Kariyavula · Answer 1 · 2012-11-13T19:31:00

Try the following

XML

<asp:TextBox ID="txtCode" runat="server" Width="200px"                         Enabled="true" OnKeyPress="return restrictCharacters(event);"></asp:TextBox>

and the below JavaScript function

C#

function restrictCharacters(e) {
    if (!e) var e = window.event;
    if (e.keyCode) code = e.keyCode;
    else if (e.which) code = e.which;
    var character = String.fromCharCode(code);
    var alphaOnly = /[A-Za-z0-9]/g;
    if (code == 27) { this.blur(); return false; }
    if (!e.ctrlKey && code != 9 && code != 8 && code != 36 && code != 37 && code != 38 && (code != 39 || (code == 39 && character == "'")) && code != 40) {
        if (character.match(alphaOnly)) {
            return true;
        } else {
            return false;
        }
    }
}

Hope this helps.